<template>
  <div class="about">
    <h1>This is an about page</h1>
    二级路由只能用在一级页面里
    <hr>
    <router-link to="/about/a" tag="button">去a</router-link>
    <router-link to="/about/b" tag="button">去b</router-link>
    
    <router-view></router-view>
  </div>
</template>
<script>
export default {
  name: "about",
};
</script>